Power-press.



E. W. ZEH.

POWER PRESS,

APPLICATION FILED MAY 29, 1912,

3 SHEETSvBHEEI l.

Patented Oct. 28, i913.

B. W. ZEH.

POWER PRESS.

APPLICATION FILED MAY 29, 1912.

1,076,931. v Patented 00u28, 191e `3 SHEETS-SHEET 2.

ATN/MEV.

E. W. 23H.

POWER PRESS. APPLICATION FILED MAY 29, 1912.

Patented 00'n.28,1913.

3 SHEETS-SHEET 3.

` IN1/mmh:

- Ammwfr.

l sliding head UNITED sTATEs EDMUND W. zEH, E NEWARK, NEW JERSEY.

roWEE-rREss.

Specification of Letters Patent.

'Patented ctu'ZSj, 1913.

Application led May 29, 1912. Serial No. 700,427.

To 072 107mm z' may' concern f Be it vknown that-I, EDMUND W. ZEIT, acitizen of the United States, residing 'at Newark, in the county ot' andState of New Jersey, have invented certain lin- .proveinents inPower-Presses, of which the following is a specification.,

This invention relates to that class of power presses in which a headfor carr \f'inf the upper die is'moved up and down by a screw and meansfor oppositely rotating said screw,

lThe objects of the invention are to secure uniformV pressure ofthedrive disks against the friction wheel of the screw and to provide -alimit to such pressure; tolsecure a which shall serve simply as a guide,and to provide other means for transmitting the pressure to the die;. toenable the wear between the said sliding head and its slideway to betaken up without displacing the center of said head laterally, ormoving:r it' ut of axial alinement with the screw; to provide improvedmeans` for'tightening the strap of the friction wheel which forms theperipheral surfaceI thereof; to secure a friction wheel which will yieldto absorb shocks and jars; to provide means for autoniatic operation ofthe press; to secure a frame especially adapted to resist the strain ofoperation of the press, and to obtain other advantages and' results asmay be. brought 'out in the following description.

Referring to the accompanying drawings, in which like numerals ofreference indicate the saine parts throughout the several figures,Figure 1 is a front view of a power press of my improred construction,in idle condition, certain of the parts being in central verticalsection; Fig. 2 is a View ofthe press from its right-hand side, as shownin Fig. l; Fig. 3 is a view of the sliding head detached, as it looksfron'i the front of the machine; Fig. f1 is a detail perspective view ofoner of the adjustable flangesof the sliding head; Fig. 5 is a similarperspective View of the wedge for moving said adjustable'tlangc; Fig. (5is a horizontal cross-section on line .fk-al, Fig. 1 looking downward;Fig. 7 is a detail edge view of the friction wheel, sho-wing how theends of the strap which forms the peripheral surface thereof arefastened; llig. 8 `is a section ot' the saine on line l'-fll, Fig. T;Fig. 9 is a plangof the friction-wheel upon the screw but removed fromthe rest of the machine;

Fig. 10 is a detail section on line (l, Fig. 1 looking in the directionindicated by the arrow, and Fig. 11 is a similar section on lino D, Fig.1, but showing the lever deiu'esscd to cause the slidinghcad to descend.

, In said d awings, lindicates the frame cf my improved press,preferably mounted upon legs i), 2 to elevate it to a suitable andconvenient height. Said traine 1 is centrally open, providing a verticalslideway for a head 3 carried upon the lower end of a screw 4 whichworks through the top of the said frame 1 and has at its upper end abovethe frame a horizontal wheel 5 pr viding at its periphery a frictionsurface. slide 3 is adapted to carry at its lower end a die, not shown,and the frame 1 lornis at the bottom of its central opening a 'led t3 toreceive the work ora lower die ada pted` to cooperate with the otherdie.` In order to raise and lower the upper die, the screw isalternately rotated'in opposite directions by the following means: Abovethe friction wheel 5 a horizontal shafty 7 'extends di a metrically ofsaid Wheel, and is journaled in brackets 8, 9 bolted to and projectingupward from the frame 1 at. opposite sides of the machine. This shaftisprovided atl one end outside the bracket S with fast and loose pulleys10 and 11 adapted to receive a driv ing belt, not shown, and which beltcan' be moved from one pulley to the'other by the belt shifter 12.Between its bearings in the brackets 8, 9, said shaft. 7 has fast uponitselt drive disks 13 and 14. adapted to alternately engage at theirinner facing sides theI opposite edges of the friction wheel 5.(lbviously, as one or the other of said drive disks 13, 1l 1s engage-l.with the friction wheel 5, said friction u'hcel will be rotated in onodirection or the otheigand the screw 4tv lowered or raised. To el'cct.such alternate engafrcnient of the drive disks ,13, 14 Awith thelriction wheel 5, thc shaft T is slid longitudinally in its bearings intheA brackets 8, t) by the following means: llponthe end of the shaft. 7outside of thc bracket l) are two collars 15, 15 made taf: to the shaftby set screws, and between said collars is a- -elceve 1G rotatably looseup.l t'hc shaft and having trunnions 17 received by the -forked end 18of a lever 19 which is fulcrulucd, as at 20, upon an arm 21 of thebracket i) so as to swing in a plane through the shaft '7, and.. whichplane I have shown substantially 'vertical. The lever 19 is at its lowerend curved ythe sa id' into substantially horizontal position aiid isconnected pivotally to thefppper-end (it a connecting rod 22.This-connecting rod-'22- has its lower end pivotallyconnect'ed, as at23; to'the arm 24 of a horiitntallyI disposed lever 25 which ispivoted'upon the frame 1 or front of thel bed 6 thereoias at 26, to

swing in a substantially vertical'plane?` The' arm of this lever 25opposite the arm .24 is provided with* a handle 27 by means ot' whichthe lever can be swung to slide the drive disk shaft 7 and so rotate thescrew 4 in either direction to move the head 3 up oi down. Preferably aweight-28 upon the arm 24 of the leverV 25 normally holds said arm 24depressed, so as to engage the drive-disk 14 with the friction-wheel 5and elevate-the wheel 5. If it should happen that the saiddrive disk 14was thrown too far away from the friction-wheel 5 so that the otherdrivey disk 13 was brought into engagement with the friction wheel 5,thel head 3 would merely start downward again, when the weight 28 wouldimmediately act to reverse its motion again and by this time themomentum -would be lost enough so that the drive disks 13 and 14 wouldboth remain out of operative engagement `with the friction wheel 5, asshown in Fig. 1. In order to give the sliding head 3 a downward stroke,therefore, 'it

-is only necessary to Qrce downward the handle 27, and simply releaseitto terminate the stroke. Ent in order to avoid having to hold down saidlever 25 until the endot the stroke, I prefer to employ a detent31,shown in Figs. 1 and 11. This detentzhas a resilient blade 77projecting upward from the base of the trame 1, at one side of the lever25, and provided with a swell 78 lying in the path of a nose 7 9 carriedby the lever. The

detent is shown mounted on the frame base l second dog 4l is arrangedupon the connecting rod 22 at the proper point to be engaged by a'threaded shank 80 extending there-- through with clamping'nuts v81, 82above and below, and having a longitudinal slot 83 to receive a setscrew 84 through the edge.

of the trame base, to prevent turning of the shank and hold the blade 77 `flatwise toward the lever, as will be understood. The lever can thusbe forced down past the swell 7 8 oi'v the det-ent and released, when itwill stay depressed and the head 3 move downward. To terminate suchdownward movement, Aa

v upon the upperend of the connecting 'r one of said members receivin bythe stop 29 and thus release the lever from the detent31, so that theweight 28 will act to elevate the hea-d as has been described. Tocushion the motion given to the c oinecting rod 22'by .impact of the sto29` against the dog 30, and to insure uni orm pressure of the drive disk13 against the friction wheel 5,1a spring 32 is arranged f' d 22 restingat its lower end upon a fixed collar 33 on said connecting rod andpressing at its upper end against a loose ring or washer 34, whichengages the lever arm 19, see Fig. 1,0. The connection of the rod 22with said arm 19 is then bv means of a vertical slot in a transverse pinin the other, as shown in `ig. 10, Where. 35 indicates a slot in theconnecting rod 22 to receive the pin 36. Obviously the slot could be inthe lever arm 19, so long as it were vertical, and the pin in theconnecting rod 22, but it is more convenient/tomake the' slot in themember where it is longitudinally disposed. By the means just described,the spring 32 will cushion the sudden movement of the connecting rod,compressing at first andAthen expanding to hold the drive disk againstthe friction wheel with a pressure which is thus always about the same.Similarly, the frictional engagement of the detent 31 with the lever 25prevents any uneushioned impacts when v, the lever 25 is moved up ordown past its swell 78, as in the automatic operation of the presshereinafter described. v

, In order to enable the lever 25 to .be operated by the' foot insteadof Ibv hand, if

desired, a rod 37 extends through the base of the frame 1,and isconnected at itsV upper end to the lever 25 by a link 38, the lower' endof the rod 37 having a stirrup 39 for the foot. Furthermore, in order toenable tlie'maohine to operate automatically, the head 3 traveling upand down without attention from the operator, a split sleeve 40 isarranged upon the said rod 37 where the same passes through the base ofthe frame l. This sleeve is normally loose upon the said rod 37, but isexteriorly threaded at its lower end and adapted to screw into acorrespondingly threaded seat in the frame base, as shown in Fig. 1, sothat it canv be sii made to. grip the said rod 37 frictionally. f

The upper endof the said sleeve 40 is adapted to receivea wrench, asshown, and when automatic o eration of the machine is dev 29 engages inturn the second dog 4l upon the connecting rod 22, which slides saidconnecting rodl downward and agm reverses tne screw. This action can becontinu-ed 1n- 'deinitely bviously, any other means than.v

'bolt 45, as shown in detail in Figs. 7 and 8.

A pocket 4,6 formed in the rim oi the wheel below the floor of thechannel 43 and therbolt 45 extends through this pocket transversely ofthe rim. The end 47 of the strap is wound around the bolt 45 and se#cured thereto, as by screws 48, so that When the tightening bolt 45 isturned by its wrench-receiving head, the strap 42 is stretched tightly.Then by tightening the nut 49, the bolt 45 is locked againstturning.

The friction Wheel 5 is preferably made iwith a tapered hub 50 uponwhich `the Wheelproper lits and" to which said Wheel-proper canbefrictionally clamped. This clampingY is accomplished by a nut 51 uponav threaded extension of the' screw shaft, a washer 52 between saidnutand the vhu 50 overlapping upon the Wheel-proper to force the sameonto Said hub, and said washer being held in non-rotatable relation tothe. hub by any suitable means, such asthe pin 53, so that-the nut 5lWill notl be turned. By the construction thus described, the frictionalengagement between the hub, 5() and the wheel-proper can be so adjustedas that said parts will slip with respect to each other underexcet'ivestrain and avoid breakage ot the machine. To secure'tiurtl'ierresiliency and rase ot' action l have toi-med the friction wheel properwith spokes 54. which 'ed outifard obliquely with respect to the radiallinesand are ot the proper size` and wei ht to a lilord a little-yielding when the wheel comes kto an abrupt Stop, or .starts suddenlyund( a heavy strain.`

'lihcrrrew vuorks in a removable nut aia-'anged in the lop ot' thetraine l, said nut being preferably inserted from beneath and hating anannular shoulder 5G adapted to e :gage a rorrespoinling shoulder 57kmthe trarne to resist upward strain when the .screw is to' l downward. Ascrew collar 5S at the projecting upper end ot' the nut holds itlagainst downward movement. and to prevent rotation the nuthas laterallugs 5f) which enter grooves l() in the lower and lai-'gest part ol.'the seat the traine tor .said nul. yl`he said annular lslnrulder 5G islshown disposed about half-Way between the upper and lower ends of thenut, and thus lnut tends to break the nut cross-sectionally reduced byincreasing the number of annular shoulders, and great strength andsolidity are thus secured by' this construction.

Fig. 6, with their thickest. edges toward each. other, and saiduedgesare provided with beveled vertical ribs 6l which form slideways for 'thehead 3,d This construction of the frame secures especial strength andsolidity vas well-as accuracy of movement of the sliding head. Said headhas at its opposite sides grooves to receive the said ribs or slidewaysor the like to be taken up,- one sidel flange, 62 or l63, of each grooveis made adjustable as. will next be described inconnection with the ange62.

NThe adjustable flange (32 comprises not only the projecting portion atthe side of the groove, but also a hase portion ti-l, which tits into arecess 65 in the' slide 3. The adjustable tlangeis then held to theslide 3 h ,1 screws or bolts G6 which 'extend through tdiinsverse slotsin said portion G4 -of the "flange into the slide itself.' For adjustingthe slide, atransverse slot (37 is formed in the edge of its base midwayof the ends, said slot decreasing in depth inwardly/ toward the slide 3.A bolt 68 threaded at both ends to receive nuts" 69, 70 extends throughthe slide and slot 67 close to the wally of the recess 65 against whichthe base of the ad justable flange 62 abuts or to "'hich wall said baseis adjacent, and this bolt carries a wedge-shaped portion '7l adapted tolie in the tapered slot 67 of the adjust-aldo ribs or slideways, theadjustable flange 62 is forced outward by loosening the nut 69 at oneend of the holt (3S and rtightening the nut T0, at. the other end, so asto draw the wedge 7l into the slot 67. VThis takes up the lost-motion,as will be understood upon reference to Fig. 6, more especially.

lt will be understood that the. two flanges (32, and (S3 are adjustedequally and .simultaneously, and .since said flanges are on oppositesides of the sliding head 3 the axial central line of the sliding headwill not/lie. displaced,y although the head may he slightly rotated,"`The bolts or screws (i0 may he lot'isened during adjustn'ient of theagain it' desired. /The head 3 serves siinplv as a. guide and docs nottransmit a downward pmssure of the screw Ll. To elllert only abo-utone-hal of the strain upon theA at said shoulder. This strain can befurther The lateral upright portions of the traine l are ot an ovalcross section, as .shown in flange. Thus if the slide is loose upon itslange 62, and att'terward tightened lup` auch downward pressure, the.lower rnd ot the screw 4 abuts within the head 8 against; the top of adie holder 72, as shown in Fig.

6l, and for enabling lost motion 'from Vwear ceive a. die and a set'screw 74 to clamp theA die in said holder, said set screwv being shownas extending through the side of the a pivoted lever adapted to slidesaid shaft,

head 3, but loose therein so as to transmit no strain to said head. Theupper end of the die holder. preferably has an annular enlargement tokeep it from drop ing out, and adjacentto. the lower end. the screwwhich engages said upper end of the die holder, said screw has anannular` recess adapted toreceive a split-ring secured to the topl ofthe slidin head 3 asby bolts 76, so as to attach said cad. to the screwto move upward therewith.

Having vthus descrbedthe invention, what I claim isf` 1. In a, press,the combination of a frame,

a screw mounted .in/said frame, a head on one end of'said screw adaptedto. slide in said ffame, afriction wheel on thel other' end of saidscrew, drive disks at opposite` edges of'said friction wheel, a slidableshaft for said Ydrive disks, 'a pivoted lever adapted to slide saidshaftgjaJ controlling lever fulcrumed upon 'said-frame, a connecting rodbetween said levers, 'and means always tending to return saidcontrolling lever into position tofengage the elevating drive disk withthe friction wheel.

2. In a press,`the combination of a frame providing a slideway, a screwmounted in said frame, a head arranged in said slideway on one end ofsaid'screw, a friction wheel on the other end rof said screw, drivedisks at opposite edges of said friction wheel, a slidable shaft forsaid drive disks, a pivoted lever adapted to slide said shaft, acontrolling lever fulcruined upon said frame at the base thereof, aconnecting rod between said levers, and a weight on said controllinglever adapted to normally holdl the elevating drive disk in engagementwith the friction wheel.

3. In a press, the combination of a' frame providing a slideway, ascrevvf mounted in said fraiiie, a head in said slideway on one end ofsaid screw, a friction wheel on the other end of said screw, drive disksat opposite edges of said friction wheel, a slid -able shaft for saiddrive disks, a pivoted lever adapted to slide said shaft, a controllinglever fulcrumed-upon said frame at the base thereof, a slidableconnecting rod between said levers adjacent said sliding head, a weightonsaid controlling lever adapted to normally hold the elevating drivedisk in engagement with the friction wheel, a dog on said connectingrod, and a stop on the sliding head adaptedto engagel said dog at theupper' end of the stro/ke of saidv head.

4C. ln afpressi the combination of a franie providing a slideway, ascrew mounted in said frame, a head arranged in said slide- I way on oneend of said screw, a friction wheel on the other end of said screw,drive disks at opposite edges of said friction wheel, a slidable shaftfor said drive disks,

a controlling lever fulcrumed upon said fra-me at the base thereof, aslidable connecting rod between said levers adjacent the sliding head,means for normally holding said controlling lever in position to engagethe elevatin drive disk with the friction wheel .means or automaticallydisengaging sai' it; i

elevating drive disk to terminate the stroke, means for releasablyholding controlling lever in position to engage the "loy lowering drivedisk with the'frictionwheel,

a dog on said connecting rod, and a stop on the sliding head adapted toenga e said dog at the lowerend of the stroke o Vsaiid head.

5. In a I press, the combination with a frame providing a slideway, ascrew mounted in said frame', a head arranged in saidA `slideway on oneend of said screw, a friction wheel on the other end of said screw,drive disks at opposite edges of said friction wheel, a slidable shaftAfor said drive disks, apivoted lever adapted .to slide said shaft, acontrolling lever fulcrumed iupOn said frame, a slidable connecting .rod-between said levers adjacent the sliding head, means for normallyholding said controlling lever in position to engage the elevating drivedisk., with the friction wheel, an upperdog on"` the connecting-rod,"xnea1 1sv for 4releasably holding the controlling leverin positionto' engage the lowering drive disk with the fric tion wheel,1a lower do.on vthe connectirg' rod, and a-stop on thes iding headadapt to engagesaid do@ at the up er and lower ends of the stro respective y.

6. In a press, the combination of a frame providing ajslideway, a screwmounted in said frame a head arranged in said slideway on one en of saidscrew, a 'friction wheel on the other endof said screw, drive disks atopposite edges-of said friction wheel, a slidable shaft for said drivedisk, a` pilot-ed lever adapted to slide saidfsha'fna control* linglever fulcruined' upon said frame at the base thereof,aslidableconnectin rod between said levers adjacent thesli ing' h eadand'having a slot-and-pin connection with the slide lever, a springnormally holding 12`o the pin of said connection at the Vend of its slotaway from the controlling lever,.in eans always-tending tohold thecontrolling lleverv L inposition to encrage the elevating'fdrive diskwith the friction wheel', adog on said" connecting rod,. and astoponrthe 'sliding head adapted to engage said dog at the up'- -per end ofthe stroke of said head.

v 7. In a press, the combination of a frame providing a slideway, ascrew mounted in said frame, a head arrangedin said.elidelivayy betweensaid levers and adjacent the sliding head. means for normally holdingthe c'on- -trolling lever in position to engage the,ele-

vating drive disk with Vthe friction wheel, a detent adapted toreleasablyhold the con;

trolling lever with the lowering drive disk in engagement with thefriction wheel, an upper dog on the connecting rod, and a stop on theslidinghead adapted to engage said dog at the upper end of thestroke ofthe head.

S. In a press, the combination of a frame providing a slideway, a screwmounted 1n said frame, a. head arranged in said'slideway on one end ofthe screw, a friction wheel on the other end of said screw, drive disksat opposite edges of said friction wheel, a slidable shaft for saiddrive disks, a )ivoted 'lever adaptedto slide said shaft, a controllinglever fulcrumed upon said frame Aat the base thereof, a slidableconnecting rod between said levers and adjacent the sliding head, meansfor normally holding the controlling lever in position to engage theelevating drive disk with the friction Wheel, a spring detent arranged st one ,side of said controlling lever and having next said lever a swelladapted to frictiollallyv resist passing of the lever, an upper dog onthe connecting rod, and a stop on the sliding head adapted to engagesaid dog at the upper-.end of the stroke of the head.

9. Inr a press, the combination of a frame providing a slideway, a screwmounted in said frame, ahead arranged in said slideway on one end ofsaid screw, a friction wheel on the other; end of saidsc-rew, drivedisks -at opposite edges of said friction wheel, 'a

slidable sha ft for said drive disks, a pivoted lever adapted to slidesaid shaft, a control; ling lever fulcrunied upon said frame at the basethereof, a slidable connecting rod between said levers adjacent theslidingihead, a weight adapted to normally hold said controllingleverinposition to engage the elevating drive disk with the friction wheel, anupper dog on the connect-ing rod, a spring detent for releasably holdingthe controlling lever in position to engage the lowering drive disk withthe friction wheel, a lower stop on the conlwctingrod, and a stop on thesliding head adapted to engage said dogs at the upper and lower ends ofthe stroke, respectively.

lO. ln a press, the combination of a frame providing` a slideway, ascrew mounted in said frame, a head'arranged in said slideway on one endof said screw, a friction wheel on the other end of said screw, drivedisks at oppositeedges of said friction wheel, a slidahle shaft for saiddrive disks, a .pivoted lever adapted to slide said shaft a controllinglever ful'cruuied upon said frame at the base thereof to swing in asubstantially `vertical plane, a connecting rod between said leversadiacent the sliding head, a weight on one end of said controllinglever, the other end of the lever providing a handle, and a stirruppivoted to said handled end of the controlling lever.

l1. In a. press, the combination of a frame i providing a slideway, ascrew mounted in said frame, a head arrangedin said slideway', on oneend of vsaid screw, a friction wheel onthe other end of said screw,drive disks at opposite edges o-f sai-d friction wheel, 'a slidableshaft for said drive disks, a pivoted lever adapted to slideI saidshaft, a controlling lever fulcrumed upon said frame at the basethereof, a connecting rodI between said levers adjacent the slidinghead, a rod pivoted to said controlling lever, an adjustable frictionsleeve for said rod, a dog on the said connecting rod, and a stop on thesliding head adapted to engage I said dog.

' 12, In a press vof the character described, the combination lwith ascrew having a hu'b tapering away from its threaded portion, said hubhaving a` pin projecting from its end vaway from said screw, of afriction wheel adapted to be seated on saidhub in frictional engagementtherewith, a washer on the hub overlapping said wheel and beingaperturedto receive. said pin, and means for clamping saidv washer against thefriction wheel.

13. In a. press, the combination of a frame providing a slideway, ahead. mounted in said slideway and having a central aperture, a dieholder in said central aperture of the head, a screw mounted in theframe and engaging the'upper end of said die holder,

and means for-turning said screw, whereby. the pressure of said screwisV transmitted l directly to the die holder and said die holder isguided by the Asliding head.

14. In ay press, the combination of a frame providing a slideway, a.head mounted in said slideway ,and having a longitudinal centralaperture enlarged at one end, a die,E holder in said central aperture ofthe head' having at one end an enlargement in said enlargement of theaperture and at its other end being adapted to receive a die, a screwmounted in the frame and abutting said enlarged end of the die holder,means connecting said sliding head to said screw to cause them to movealong the slideway together, and means at the other end of the screw forturning the same.

15. In a press, the combination of a frame providing a. slideway withopposite beveled ribs, a head in said'slidevvay grooved at its oppositeedges to receive said ribs, one flange of each groove' at opposite sidesof the head being adjustable in edgevvise direction avvaj7 from the head.toward the frame, and means for adjusting said ilanges, Wherebylost-moetion of' the sliding head in its slidevvay can be taken up withoutdisplacing the axial central line of said head. 10 16. Ina press, thecombination of a frame providing a slidevvay with opposite beveled ribs,a head in said slideway having at its opposite edges grooves to receivesaid ribs and flanges to lie at opposite sides thereof, one

l ange at each'edge of said head and on opposite sides thereof beingadjustable in edgewise direction away from the head toward the frame,bolts having Wedge-shaped portions at the middles of said adjustable 2o'flanges for adjusting them, and means for clamping said adjustableflanges in position l when adjusted. y

17 In a press, the Combination of al frame providing a slideWay withopposite beveled ribs, a head in 'said slideivay having at its oppositeedges grooves to receive said ribs and flanges to lie at opposite sidesthereof, one langeat each edge of said head and on opposite sidesthereof beingsepara-ble from the head and havingA in its edge next saidhead a slot with a tapered Wall next the 4outer edge of the flange, saidslot being, midway of the length of the ange and said flan e havin@rnear its ends transverse slots a bolt extending through the head andmiddle slot in each adjustable flange, said bolt having a Wedge-shapedportion adapted to engag said tapered Wall, clamping bolts in the endslots of each adjustable flange, and. igults on the opposite ends ofsaid adjusting o ts 18. In a press, the combination oa frame providingan opening with slideways at 'the opposite sides thereof and a bed atone en'd, a screw mounted in said frame at the other end of saidopening, the said frame at each side. of `said opening being ofoval'crosssection With the thickest edge toward said opening andprovided with ribs forming the said slidewajys7 a head adapted to slide50 on said slideways, means connecting said head to said screw, andmeans for turning said screw.

EDMUND vv. ZEH.

Witnesses:

HOWARD P. KING, l FRANCES E, BLODGETL.

